﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace UtilsLib
{
    public class StringToByte
    {
        #region 将字符串转换成16进制

        public static string Get_StrTo16No(string hexString)
        {
            string strInfo = string.Empty;
            byte[] bytes = Encoding.Default.GetBytes(hexString);
            for (int i = 0; i < bytes.Length; i++)
            {
                strInfo += bytes[i].ToString("x");
            }
            return strInfo;
        }

        #endregion

        #region 字符串16进制转换方法
        /// <summary>
        /// 字符串转16进制字节数组
        /// </summary>
        /// <param name="hexString"></param>
        /// <returns></returns>
        public static byte[] strToToHexByte(string hexString)
        {
            hexString = hexString.Replace(" ", "");
            if ((hexString.Length % 2) != 0)
                hexString += " ";
            byte[] returnBytes = new byte[hexString.Length / 2];
            string str_new_text = string.Empty;
            for (int i = 0; i < returnBytes.Length; i++)
            {
                returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
            }

            return returnBytes;
        }

        /// <summary>
        /// 字节数组转16进制字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string byteToHexStr(byte[] bytes, int length)
        {
            string returnStr = string.Empty;
            if (length > 0)
            {
                if (bytes != null)
                {
                    for (int i = 0; i < length; i++)
                    {
                        returnStr += bytes[i].ToString("X2");
                    }
                }
            }
            return returnStr;
        }
        /// <summary>
        /// 字节数组转16进制字符串
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static string byteToHexStr(byte[] bytes, int length, string splitString = "")
        {
            string returnStr = string.Empty;
            if (length > 0)
            {
                if (bytes != null)
                {
                    for (int i = 0; i < length; i++)
                    {
                        returnStr += bytes[i].ToString("X2") + splitString;
                    }
                }
            }
            return returnStr;
        }
        #endregion

        #region 16位CRC
        /// <summary>
        /// 获取16位crc校验值
        /// </summary>
        /// <param name="ptr"></param>
        /// <param name="len"></param>
        /// <returns></returns>
        public static UInt16 GetCRC16(byte[] ptr, int len)
        {
            byte i;
            UInt16 crc = 0;
            int k = 0;
            while (len-- != 0)
            {
                for (i = 0x80; i != 0; i /= 2)
                {
                    if ((crc & 0x8000) != 0) { crc *= 2; crc ^= 0x1021; } /* 余式CRC 乘以2 再求CRC */
                    else crc *= 2;
                    if ((ptr[k] & i) != 0) crc ^= 0x1021; /* 再加上本位的CRC */
                }
                k++;
            }
            return crc;
        }
        #endregion

        #region 获取crc32
        /// <summary>
        /// 获取crc32
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static int Get_CRC32(byte[] bytes)
        {
            #region crc table
            UInt32[] crcTable = {
             0x0, 0x77073096, 0xee0e612c, 0x990951ba, 0x76dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
             0xedb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x9b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
             0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
             0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
             0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
             0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
             0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
             0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
             0x76dc4190, 0x1db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x6b6b51f, 0x9fbfe4a5, 0xe8b8d433,
             0x7807c9a2, 0xf00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x86d3d2d, 0x91646c97, 0xe6635c01,
             0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
             0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
             0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
             0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
             0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
             0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
             0xedb88320, 0x9abfb3b6, 0x3b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x4db2615, 0x73dc1683,
             0xe3630b12, 0x94643b84, 0xd6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0xa00ae27, 0x7d079eb1,
             0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
             0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
             0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
             0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
             0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
             0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
             0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x26d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x5005713,
             0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0xcb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0xbdbdf21,
             0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
             0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
             0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
             0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
             0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
             0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
            };
            #endregion

            int iCount = bytes.Length;
            UInt32 crc = 0xFFFFFFFF;
            for (int i = 0; i < iCount; i++)
            {
                crc = ((crc >> 8) & 0x00FFFFFF) ^ crcTable[(crc ^ bytes[i]) & 0xFF];
            }
            UInt32 temp = crc ^ 0xFFFFFFFF;
            int t = (int)temp;
            return (t);
        }
        #endregion

        #region CRC校验
        /// <summary>
        /// 计算CRC校验值
        /// </summary>
        /// <param name="data">校验的字节数组</param>
        /// <param name="len">校验的数组长度</param>
        /// <returns>该字节数组的奇偶校验字节</returns>
        public static void Get_CRC(byte[] data, ref byte[] datas, int len)
        {
            byte i;
            int crc = 0;
            int index = 0;
            while (len-- != 0)
            {
                for (i = 0x80; i != 0; i /= 2)
                {
                    if ((crc & 0x8000) != 0)
                    {
                        crc *= 2;
                        crc ^= 0x1021;
                    } /* 余式CRC 乘以2 再求CRC */
                    else crc *= 2;
                    if ((data[index] & i) != 0) crc ^= 0x1021; /* 再加上本位的CRC */
                }
                index++;
            }
            datas[0] = (byte)(crc / 256);
            datas[1] = (byte)(crc % 256);

        }
        #endregion

        #region 获取接收数据指定值
        /// <summary>
        /// 获取接收数据指定值
        /// </summary>
        /// <param name="message">接收数据</param>
        /// <param name="startIndex">开始索引</param>
        /// <param name="Length">长度</param>
        /// <returns></returns>
        public static string Get_NewTetx(string message, int startIndex, int Length)
        {
            string str_text = string.Empty;
            str_text = message.Substring((startIndex - 1) * 2, Length * 2);
            return str_text;
        }
        #endregion

    }
}
